Newmarket, ON, is in area code +1 905, with overlay codes +1 289 and +1 365.
(The plus sign means "insert your international access prefix here." From a GSM mobile phone, you can enter the number in full international format, starting with the plus sign. The most common prefix is 00, but Japan uses 010, Australia uses 0011, and many other countries use different prefixes.)
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Not found on Canada Post website. Suggest you phone Canada Post or visit your local post office.
The country code and area code of Newmarket, United Kingdom is 44, (0)1638.
The area code for Stratford, Ontario, Canada is 519 or 226. (226 is an overlay of 519, serving the same geographic territory.)
Area code 323 is located in that famous part of Ontario, Canada, called "downtown Los Angeles, California, USA."
Area code 01685 (or from outside the UK, +44 1685) is Merthyr Tydfil in Wales.
Area code 613 and overlay area code 343 serve eastern Ontario, Canada, including Ottawa. There are no reliable statistics on the population in that specific region.
Area code 647 is the city of Toronto, Ontario, Canada, in an overlay on area code 416.
Area code 343 has been assigned in Canada, to overlay the 613 area code in Eastern Ontario. This area includes Ottawa
The Postal Code for Harrowsmith, Ontario Canada is: K0H 1V0
Toronto, Ontario, Canada - Eastern Time Zone
Area code 613 (and overlay area code 343) is Ottawa, Ontario, Canada, and nearby areas. The 613-909 prefix is in Ottawa.